| 摘要 |
<p>The apparatus has pins (15) which are pivotably connected to the end of a first rod (5) which is pivotable (8) with its other end in the frame of the apparatus, a second rod (11) extending substantially parallel to the first rod (5) being pivotably connected with one end (12) to a point of the pin (15) below the pivot point (4). The other end (10) of the second rod (11) is likewise pivotably provided in the frame of the apparatus, the second rod having a yielding portion (16). The pins (15) penetrate into the soil substantially along a straight line, but pivot rearwardly around the pivots (4) as permitted by the resilient portion (16) in the second rod (11). Thereby the hole made is widened at its lower end for better water storing capacity while at the same time the soil is crumbled and the hole wall made porous for better water permeability. During the pivotal movement of the pins they remain substantially stationary at the location of the soil surface or turf, so that no damage of the turf is produced. </p> |
